If you have a problem with too many furry posts I have bad news for you about Bluesky
Every feed on the site is its own algorithm, and most are made by third-parties. Some of the more interesting ones have fallen over and broken a little as the volume of posts has increased. The various "catch up" feeds that show the most popular recent posts give a good impression of what's happening site wide (minus any blocks/mutes).
If so, you're probably looking for the "show less of this" feature rather than muting?